Handheld vacuum cleaner

ABSTRACT

A handheld vacuum cleaner includes a fluid flow path extending from a dirty air inlet to a clean air outlet, a main body, and a motor assembly positioned in the main body and along the fluid flow path. The motor defines a motor rotational axis. The handheld vacuum cleaner also includes a cyclonic chamber positioned in the fluid flow path. The cyclonic chamber defines a separator axis. The separator axis and the motor rotational axis form an obtuse angle extending between the cyclonic chamber and the motor assembly. The handheld vacuum cleaner further includes a pre-motor filter in the fluid flow path downstream from the cyclonic chamber and upstream from the motor assembly, a plenum in the fluid flow path immediately upstream from the motor assembly, and a sensor positioned on the plenum. The sensor is operable to measure a characteristic of the fluid flow path.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.16/487,500, filed on Aug. 21, 2019, which is a U.S. National Phase ofInternational Patent Application No. PCT/CN2017/075038, filed on Feb.27, 2017, the entire contents of each being incorporated by referenceherein.

BACKGROUND

The present invention relates to handheld vacuum cleaners, and moreparticularly, to cyclonic handheld vacuum cleaners.

SUMMARY

In one embodiment, the invention provides a handheld vacuum cleanerincluding a fluid flow path extending from a dirty air inlet to a cleanair outlet, a main body with a handle, and a motor assembly positionedin the main body and along the fluid flow path. The motor defines amotor rotational axis. The handheld vacuum cleaner also includes acyclonic chamber positioned in the fluid flow path. The cyclonic chamberincludes a cyclone dirty fluid inlet and a cyclone clean fluid outlet.The cyclonic chamber defines a separator axis. The separator axis andthe motor rotational axis form an obtuse angle extending between thecyclonic chamber and the motor assembly. The handheld vacuum cleanerfurther includes a pre-motor filter in the fluid flow path downstreamfrom the cyclonic chamber and upstream from the motor assembly, a plenumin the fluid flow path immediately upstream from the motor assembly, anda sensor positioned on the plenum. The sensor is operable to measure acharacteristic of the fluid flow path.

In another embodiment, the invention provides a method of controlling avacuum cleaner having a fluid flow path extending from a dirty air inletto a clean air outlet. The method including monitoring a user activatedswitch, activating a motor of the vacuum providing airflow along thefluid flow path while the user activated switch is activated, anddetermining when the user activated switch is activated twice within apredetermined period of time. The method further includes continuouslyactivating the motor without further activation of the user activatedswitch upon determining the user activated switch has been activatedtwice within the predetermined period of time.

Other aspects of the invention will become apparent by consideration ofthe detailed description and accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a handheld vacuum cleaner according toan embodiment of the invention.

FIG. 2 is another perspective view of the handheld vacuum cleaner ofFIG. 1.

FIG. 3 is a cross-sectional view of the handheld vacuum cleaner of FIG.1, taken along lines 3-3 shown in FIG. 1.

FIG. 4 is a cross-sectional view of the handheld vacuum cleaner of FIG.1, shown in an in-use position with a separator axis orientedvertically.

FIG. 5A is a partial cross-sectional view of the handheld vacuum cleanerof FIG. 1, illustrating a battery latch in a locked position.

FIG. 5B is a partial cross-sectional view of the handheld vacuum cleanerof FIG. 1, illustrating the battery latch in a released position.

FIG. 6 perspective view of the handheld vacuum cleaner of FIG. 1,showing an inlet nozzle in phantom.

FIG. 7 is a partial cross-sectional view of the handheld vacuum cleanerof FIG. 1.

FIG. 8 is a cross-sectional view of the handheld vacuum cleaner of FIG.1, with a cyclonic separator assembly partially removed from a mainbody.

FIG. 9 is a schematic view of an alert transmission system for thehandheld vacuum cleaner of FIG. 1.

FIG. 10 is a flow chart illustrating a method of controlling thehandheld vacuum cleaner of FIG. 1.

FIG. 11 is a perspective view of the handheld vacuum cleaner of FIG. 1coupled to a surface cleaning attachment according to an embodiment ofthe invention.

FIG. 12 is a cross-sectional view of the handheld vacuum cleaner and thesurface cleaning attachment of FIG. 11, in a stored position.

FIG. 13 is a cross-sectional view of the handheld vacuum cleaner and thesurface cleaning attachment of FIG. 11 in an in-use position.

FIG. 14 is a bottom perspective view of a handheld vacuum cleaneraccording to another embodiment of the invention.

Before any embodiments of the invention are explained in detail, it isto be understood that the invention is not limited in its application tothe details of construction and the arrangement of components set forthin the following description or illustrated in the following drawings.The invention is capable of other embodiments and of being practiced orof being carried out in various ways.

DETAILED DESCRIPTION

FIGS. 1-8 illustrate a handheld vacuum cleaner 10. The handheld vacuumcleaner 10 includes a fluid flow path extending from a dirty air inlet14 to a clean air outlet 18. The handheld vacuum cleaner 10 alsoincludes a main body 22 (i.e., a main housing) and a cyclonic separatorassembly 26 removably coupled to the main body 22. The cyclonicseparator assembly 26 includes a cyclonic chamber 30 that defines aseparator axis 34, a dirt collection region 38, and an inlet nozzle 42that defines an inlet axis 46. The handheld vacuum cleaner 10 includes afront 50, a rear 54, a first lateral side 58, a second lateral side 62,a top 66, and a bottom 70. Similarly, the main body 22 includes a front74, a rear 78, a first lateral side 82, a second lateral side 86, a top90, and a bottom 94. In the illustrated embodiment, the dirty air inlet14 is positioned at the front 50 of the handheld vacuum cleaner 10 andthe clean air outlet 18 is positioned on the first and second lateralsides 58, 62 toward the rear 54 of the handheld vacuum 10. As describedin greater detail below, the dirty air inlet 14 extends along the inletaxis 46.

With reference to FIGS. 1-3, the main body 22 includes a handle 98 and abottom surface 102 on the bottom 94, upon which the handheld vacuumcleaner 10 is configured to be positioned on (i.e., supported on, restedon) a horizontal surface 106 (FIG. 3). The handle 98 of the main body 22extends along a handle axis 110 (FIG. 3) and includes a trigger 100. Thehandheld vacuum cleaner 10 further includes a motor assembly 114positioned within the main body 22 and operable to generate an airflowthrough the fluid flow path. In particular, the motor assembly 114includes a motor 118 with a motor shaft 122 defining a motor rotationalaxis 126 and a fan 130 coupled to the motor shaft 122 for co-rotation.In the illustrated embodiment, the handle axis 110 interests the motorassembly 114. In addition, the motor rotational axis 126 intersects theinlet axis 46. In other words, the inlet axis 46 intersects the motorassembly 114. In particular, the motor rotational axis 126 intersectsthe inlet axis 46 forming an acute angle 134 (FIG. 3) extending betweenthe dirty air inlet 14 and the motor 118 (i.e., counter-clockwise fromthe inlet axis 46 as viewed from FIG. 3). In the illustrated embodiment,the inlet axis 46 intersects the handle axis 110 but does not intersectthe handle 98.

For the purpose of the description herein, two axes intersecting to forman angle includes two axes that are non-parallel and intersect as viewedin at least one plane. In some embodiments, two axes intersecting toform an angle may include two axes that are co-planar and that intersectat a single point. In other embodiments, the two axes intersecting toform an angle may include two axes that are skewed with respect to eachother (i.e., not co-planar), but the axes intersect as viewed from acertain perspective (e.g., a side view, a top view, etc.).

With continued reference to FIGS. 1-3, the handheld vacuum cleaner 10includes a battery 138 (i.e., a removable, rechargeable battery pack) tosupply power to the motor assembly 114 and other electrical components.The battery 138 includes a first side surface 142 and a second sidesurface 146 opposite the first side surface 142. The main body 22includes a receptacle 150 having an inlet 154 to receive the battery138. In other words, the battery 138 is configured to be selectivelyreceived within the receptacle 150. As described in greater detailbelow, the battery 138 is inserted into the receptacle 150, through theinlet 154, along a battery insertion axis 158. In other words, the mainbody 22 is configured such that the battery 138 is insertable into thereceptacle 150 through the bottom surface 102. In addition, at least aportion of the battery 138 is positioned between the cyclone chamber 30and the bottom surface 102.

With reference to FIG. 3, the battery insertion axis 158 intersects theseparator axis 34. In addition, the battery insertion axis 158 is offsetfrom and in some embodiments parallel to the handle axis 110. Inalternative embodiments, the battery insertion axis is along theseparator axis and intersects the handle axis (e.g., FIG. 14). Also, themotor rotational axis 126 intersects the battery insertion axis 158.Furthermore, the battery insertion axis 158 intersects the inlet axis46. In particular, the battery insertion axis 158 intersects the inletaxis 46 to form an obtuse angle 162 extending between the dirty airinlet 14 and the battery 138 (i.e., counter-clockwise from the inletaxis 46 as viewed from FIG. 3).

In the illustrated embodiment, the receptacle 150 is defined by a firstwall 166, a second wall 170 opposite the first wall 166, and a curvedthird wall 174 extending between the first wall 166 and the second wall170. In the illustrated embodiment, the first wall 166 and the secondwall 170 are only connected by the third wall 174. In other words, inthe illustrated embodiment, the receptacle 150 includes a first aperture178 at the first lateral side 82 of the main body 22 and a secondaperture 182 at the second lateral side 86 of the main body 22.Moreover, the first aperture 178 and the second aperture 182 extendtoward the receptacle inlet 154 such that the battery 138 is graspableby a user between the installed position (i.e., with the battery 138fully inserted into the receptacle 150, e.g., FIG. 5A) and the removedposition (i.e., with the battery 138 at least partially removed from thereceptacle 150, e.g., FIG. 5B). In the illustrated embodiment, the firstaperture 178 and the second aperture 182 are continuous with thereceptacle inlet 154. In other words, the apertures 178, 182 and theinlet 154 form a slot that is open to the first lateral side 82 of themain body 22, open to the second lateral side 86 of the main body 22,and open to the bottom 94 of the main body 22. The first side surface142 and the second side surface 146 of the battery 138 extend parallelto the insertion axis 158 when the battery 138 is positioned within thereceptacle 150. In alternative embodiments, the apertures 178, 182 arenot continuous with the receptacle inlet 154 or are only partiallycontinuous with the receptacle inlet 154 yet still configured for thebattery to be graspable, or engaged by, a user through the apertures,for example to aid in insertion and removal of the battery.

When the battery 138 is positioned within the receptacle 150, each ofthe first side surface 142 and the second side surface 146 of thebattery 138 are substantially exposed through the apertures 178, 182 atthe respective first and second lateral sides 82, 86 of the main body 22such that the first and second side surfaces 142, 146 are graspable by auser. In some embodiments, the first side surface 142 and the secondside surface 146 are substantially exposed with at least 25 percent ofthe surfaces 142, 146 exposed through the apertures 178, 182 at therespective first and second lateral sides 82, 86 of the main body 22. Inother embodiments, the first side surface 142 and the second sidesurface 146 are substantially exposed with at least 50 percent of thesurfaces 142, 146 exposed through the apertures 178, 182 at therespective first and second lateral sides 82, 86 of the main body 22. Inother embodiments, the first side surface 142 and the second sidesurface 146 are substantially exposed with at least 75 percent of thesurfaces 142, 146 exposed through the apertures 178, 182 at therespective first and second lateral sides 82, 86 of the main body 22. Inother embodiments, the first side surface 142 and the second sidesurface 146 are substantially exposed with 100 percent of the surfaces142, 146 exposed through the apertures 178, 182 at the respective firstand second lateral sides 82, 86 of the main body 22 (i.e., entirelyexposed). As such, the battery 138 is readily graspable by a user (i.e.,at the first and second side surfaces 142, 146) when the battery 138 ispositioned within the receptacle 150.

With reference to FIGS. 1-3, the battery 138 further includes a firstsurface 186, a second surface 190, a third surface 194, and a fourthsurface 198 each extending between the first side surface 142 and thesecond side surface 146. In the illustrated embodiment, the firstsurface 186 is opposite the third surface 194 and the second surface 190is opposite the fourth surface 198. At least one of the first surface186, second surface 190, and fourth surface 198 includes an electricalcontact 202 that is selectively electrically connected to acorresponding electrical contact 206 formed in the receptacle 150. Inthe illustrated embodiment, the electrical contact 206 in the receptacle150 is formed on the third wall 174 of the receptacle 150 correspondingto the electrical contact 202 on the first surface 186.

When the battery 138 is positioned within the receptacle 150, the thirdsurface 194 of the battery 138 is substantially exposed such that thethird surface 194 is in the direction of the receptacle inlet 154 (i.e.,exposed at the bottom surface 102 of the main body 22). In someembodiments, the third surface 194 of the battery 138 is entirelyexposed. Alternatively, the receptacle inlet 154 may be selectivelyclosed by a cover or door that at least partially covers the thirdsurface 194 of the battery. Also when the battery 138 is positionedwithin the receptacle 150, the first surface 186, the second surface190, and the fourth surface 198 are in facing relationship with the mainbody 22. More specifically, the first surface 186 is in facingrelationship with the third wall 174 of the main body 22, the secondsurface 190 is in facing relationship with the first wall 166 of themain body 22, and the fourth surface 198 is in facing relationship withthe second wall 170 of the main body 22. Moreover, when the battery 138is positioned within the receptacle 150, at least a portion of thebattery 138 is positioned between the cyclonic chamber 30 and the handle98. In other words, the receptacle 150 is formed in the main body 22between at least a portion of the cyclonic separator assembly 26 (e.g.,the cyclonic chamber 30) and the handle 98.

With reference to FIG. 14, a handheld vacuum cleaner 1010 according toan alternative embodiment is illustrated. The handheld vacuum cleaner1010 is similar to the handheld vacuum cleaner 10, with only thedifferences described herein. In particular, the handheld vacuum cleaner1010 includes a main body 1022 including a front 1074, a first lateralside 1082, a second lateral side 1086, a handle 1098, and a receptacle1150 having an inlet 1154. The handheld vacuum cleaner 1010 alsoincludes a motor assembly 1114 positioned within the main body 1022, adirty air inlet 1014 positioned at a front 1050 of the handheld vacuumcleaner 1010, and a cyclonic chamber 1030 in fluid communication withthe dirty air inlet 1014 and the motor assembly 1114. The handheldvacuum cleaner 1010 also includes a battery 1138 having a first sidesurface 1142 and a second side surface 1146 opposite the first sidesurface 1142. Similar to the battery 138, the battery 1138 is configuredto be selectively received through the receptacle inlet 1154 and movableby a user between an installed position in the receptacle 1150 and aremoved position separate from the main body 1022.

With continued reference to FIG. 14, the main body 1022 includes a firstaperture 1178 through the first lateral side 1082 aligned with at leasta portion of the battery first side surface 1142 when the battery 1138is positioned within the receptacle 1150. At least a portion of thebattery first side surface 1142 is viewable by a user through the firstaperture 1178 when the battery 1138 is positioned within the receptacle1150. The main body 1022, in some embodiments, may include a secondaperture (not shown) through the second lateral side 1086. The secondaperture may be a mirror image of the first aperture 1178 aligned withat least a portion of the battery second side surface 1146 when thebattery 1138 is positioned within the receptacle 1150. At least aportion of the battery second side surface 1146 is viewable by a userthrough the second aperture when the battery 1138 is positioned withinthe receptacle 1150. Each of the first side surface 1142 and the secondside surface 1146 are at least 25 percent exposed at the lateral sides1082, 1086 of the main body 1022 when the battery 1138 is positionedwithin the receptacle 1150, such that the first and second side surfaces1142, 1146 are graspable by a user. Similar to the apertures 178, 182,the first aperture 1178 and the second aperture extend toward thereceptacle inlet 1154 such that the battery 1138 is graspable by a userbetween the installed position and the removed position. As such, theapertures provide a visual indication to the user that the battery 1138is installed within the receptacle 1150. The battery insertion axis 1158is along and may be parallel to the separator axis 1034 in thealternative handheld vacuum cleaner 1010 of FIG. 14.

With reference to FIG. 3 and the handheld vacuum cleaner 10, when thebottom surface 102 is placed on the horizontal surface 106, theseparator axis 34 is inclined relative to a vertical axis 210. Inaddition, the inlet axis 46 is within 10 degrees of horizontal when thebottom surface 102 is placed on the horizontal surface 106. Inalternative embodiments, the inlet axis 46 is parallel with thehorizontal surface 106 when the bottom surface 102 is placed on thehorizontal surface 106.

With reference to FIG. 4 and FIG. 13, the inlet axis 46 and theseparator axis 34 intersect to form an acute angle 214 extending betweenthe dirty air inlet 14 and the cyclonic chamber 30 (i.e.,counter-clockwise from the inlet axis 46 as viewed from FIG. 3). Theacute angle 214 is within the range of approximately 30 degrees toapproximately 70 degrees such that when the handheld vacuum cleaner 10is operated in a normal operating condition (e.g., FIG. 4, FIG. 13) withthe dirty air inlet 14 pointed downwardly, the separator axis 34 isoriented vertically. In alternative embodiments, the acute angle 214 iswithin a range of approximately 40 degrees to approximately 60 degrees.In further embodiments, the acute angle 214 is within a range ofapproximately 45 degrees to approximately 55 degrees. In someembodiments, the acute angle 214 is approximately 50 degrees.

With reference to FIG. 2, the main body 22 includes a rear-facingsurface 218 opposite the dirty air inlet 14. In other words, therear-facing surface 218 is formed on the rear 78 of the main body 22 andfaces a user during operation. A user interface 222 is positioned on therear-facing surface 218 adjacent the handle 98. The user interface 222may include a button, switch, touch screen, dial or otheruser-manipulative interface. In the illustrated embodiment, the userinterface 222 includes a visual indicator or display 422 operable todisplay information on the user-facing surface 218. The visual indicator422 may be a screen, LEDs, graphical interface, or other visualindicator. The user interface 222 is electrically connected to thebattery 138 and a vacuum controller 410 and is connected to and operableto control and display information about features of the vacuum cleaner,for example battery life, power setting, system performance or otherinformation. The user interface 222 may be connected to and operable tocontrol and display information about features on attached accessorytools, such as brush motors or sensors. In the illustrated embodiment,the user-interface 222 may be configured to vary operation of abrushroll (e.g., brushroll 578 of FIG. 12). In particular, activation ofthe user-interface 222 varies operation of the brushroll between acarpet mode and a hard floor mode, or between a high brushroll speed andlow or off brushroll speed.

The inlet nozzle 42 is positioned at the front 50 of the handheld vacuumcleaner 10 when the cyclonic separator assembly 26 is coupled to themain body 22. In the illustrated embodiment, the dirty air inlet 14includes an inlet aperture 226 formed in the inlet nozzle 42. As part ofthe dirty air inlet 14, the inlet nozzle 42 houses a first air passage230 (e.g., a first air tube) and a second air passage 234 (e.g., asecond air tube) downstream of the first air passage 230. The first airpassage 230 extends along the inlet axis 46 (i.e., a first axis), andthe second air passage 234 defines a second axis 238 extending toward acyclone inlet 302. The first axis 46 and the second axis 238 intersectto form an angle 242 as viewed from a vertical cross-section taken froma lateral side (e.g., 58, 62) of the handheld vacuum cleaner 10 (e.g.,FIG. 3). In the illustrated embodiment, the second air passage 234includes a tangential inlet 246 to the cyclonic chamber 30. In otherwords, the first air passage 230 extends from the front 50, while thesecond air passage 234 extends toward the bottom 70 and extends towardthe first lateral side 58 toward the cyclone inlet 302 of the handheldvacuum cleaner 10.

With reference to FIG. 3, the inlet axis 46 and the handle axis 110intersect to form an obtuse angle 250 extending between the dirty airinlet 14 and the handle 106. In other words, the angle 250 formed by theintersection of the inlet axis 46 and the handle axis 110 is greaterthan 90 degrees and less than 180 degrees, taken in a direction from theinlet axis 46 toward the handle 98 (i.e., counter-clockwise from theinlet axis 46 as viewed from FIG. 3)).

With reference to FIG. 6, the inlet nozzle 42 includes an upstreamportion 254 having a first cross-sectional area 258 and a downstreamportion 262 having a second cross-sectional area 266. The inlet nozzle42 also includes an upstream height 270 measured perpendicular to theinlet axis 46 and a downstream height 274 measured parallel to theseparator axis 34. The downstream height 274 is larger than the upstreamheight 270. In some embodiments, the downstream height 274 is at least1.3 times larger than the upstream height 270. Alternatively, thedownstream height 274 is at least 1.5 times larger than the upstreamheight 270. In some embodiments, the downstream height 274 is in therange from 1.5 to 3 times larger than the upstream height 270. In yetanother embodiment, the downstream height 274 is at least 3 times largerthan the upstream height 270. In other words, height of the inlet nozzle42 increases in the downstream direction.

Generally, the upstream height 270 is measured at a location where theinlet nozzle 42 begins increasing in height in the downstream direction.In some embodiments, the upstream height 270 is measured at a height 290at the inlet 14 (i.e., at the inlet aperture 226). In other embodiments,the upstream height 270 is measured between the inlet 14 and thedownstream height 274. In the illustrated embodiment, the upstream endof the inlet nozzle 42 includes a space 278 for an accessory latch(e.g., the attachment 554 of FIG. 11) and a space 282 for an electricalconnection 286. In other words, in some embodiments, the inlet nozzle 42increases in height in the downstream direction, throughout the entirelength of the inlet nozzle 42. In other embodiments, the inlet nozzle 42increases in height in the downstream direction for at least a portionof the inlet nozzle 42 length. Said another way, the inlet nozzle heightmay increase in the upstream direction and in the downstream direction,with a minimum height therebetween. In the illustrated embodiment, theheight 270 is approximately 53 millimeters. In some embodiments, thedownstream height 274 is measured where the inlet nozzle 42 and thecyclonic chamber 30 meet (FIG. 3). In the illustrated embodiments, thedownstream height 274 is approximately 90 millimeters.

With continued reference to FIG. 6, the second cross-sectional area 266is at least 1.5 times larger than the first cross-sectional area 258. Inalternative embodiments, the second cross-sectional area 266 is at least3 times larger than the first cross-sectional area 258. With referenceto FIGS. 3 and 4, the cyclonic separator assembly 26 defines a separatorheight 298 (FIG. 4) that extends along the separator axis 34, and thedownstream height 274 (FIG. 3) parallel to the separator axis 34 isgreater than one half of the separator height 298. In other words, theinlet nozzle 42 expands in both the horizontal direction (i.e.,transverse the separator axis 34) and the vertical direction (i.e.,parallel to the separator axis 34). The increased second cross-sectionalarea 266 (i.e., the increased downstream height 274) provides forimproved structural integrity of the inlet nozzle 42 connection to theremaining portions of the cyclonic separator assembly 26. In otherwords, the size and shape of the inlet nozzle 42 provides improvedstrength and reliability of the inlet nozzle 42 connecting to theremaining portions of the cyclonic separator assembly 26.

The cyclonic chamber 30 is in fluid communication with the dirty airinlet 14 and the motor assembly 114. In addition, the cyclonic chamber30 (i.e., the cyclonic separator) includes the cyclone dirty fluid inlet302, a dirt outlet 306, and a clean fluid outlet 310. In the illustratedembodiment, the cyclonic chamber 30 includes a primary cyclonic stage314 and a secondary cyclonic stage 318 positioned between the dirtyfluid inlet 302 and the clean fluid outlet 310 (FIG. 4). In alternativeembodiments, the cyclonic chamber 30 may include more or less than twocyclonic stages. In particular, the cyclonic chamber 30 includes aperforated shroud 322 through which air cleaned by the primary cyclonicstage 314 flows through. The secondary cyclonic stage 318 is positioneddownstream of the perforated shroud 322 and the secondary cyclonic stage318 includes a secondary dirty air tangential inlet 326 (FIG. 4), asecondary funnel 330, and a secondary dirt outlet 334. The air cleanedby the secondary cyclonic stage 318 flows to the clean fluid outlet 310.In alternative embodiments, the illustrated cyclonic chamber 30 can bereplaced with alternative dirt separators (e.g., over-the-wall cyclonicseparators, bagged separators, etc.)

As described above, the inlet axis 46 and the separator axis 34intersect to form the acute angle 214 extending between the dirty airinlet 14 and the cyclonic chamber 30. In other words, the angle 214formed by the intersection of the inlet axis 46 and the separator axis34 is less than 90 degrees, taken in a direction from the inlet axis 46toward the cyclonic chamber 30 (i.e., counterclockwise as viewed fromFIG. 3). In addition, the separator axis 34 and the motor rotationalaxis 126 interest to form an obtuse angle 342 extending between thecyclonic chamber 30 and the motor assembly 114. In other words, theangle 342 formed by the intersection of the separator axis 34 and themotor rotational axis 126 is in a range from about 90 degrees to 180degrees, taken in a direction from the cyclonic chamber 30 toward themotor assembly 114 (i.e., counterclockwise as viewed from FIG. 3). Insome embodiments, the obtuse angle 342 extending between the cyclonicchamber 30 and the motor assembly 114 is within a range of approximately90 degrees to approximately 165 degrees. In alternative embodiments, theobtuse angle 342 extending between the cyclonic chamber 30 and the motorassembly 114 is within a range of approximately 135 degrees toapproximately 150 degrees. In further alternative embodiments, theobtuse angle 342 extending between the cyclonic chamber 30 and the motorassembly 114 is approximately 140 to 145 degrees.

With reference to FIG. 1, the dirt collection region 38 is configured toreceive debris from the dirt outlets 306, 334 that has been separated inthe cyclonic chamber 30. Specifically, the dirt collection region 38receives debris separated by the primary cyclonic stage 314 at the dirtoutlet 306 and receives debris separated by the secondary cyclonic stage318 at the dirt outlet 334. In the illustrated embodiment, the dirtcollection region 38 includes an expanded portion 346. The dirtcollection region 38 includes a bottom door 350 that is openable toempty out the dirt collection region 38. In particular, a latch 354secures the door 350 in a closed position and the latch 354 is actuatedto pivot the door 350 about a pivot 358 to an open position.

With reference to FIG. 7, the cyclonic separator assembly 26 furtherincludes a pre-motor filter 362 in the fluid flow path downstream fromthe cyclonic chamber 30 and upstream from the motor assembly 114.Specifically, the pre-motor filter 362 includes an upstream surface 366facing the cyclonic clean fluid outlet 310 and a downstream surface 370opposite the upstream surface 366. The pre-motor filter 362 ispositioned within a filter chamber 374 downstream of the cyclonic cleanfluid outlet 310. In the illustrated embodiment, the motor rotationalaxis 126 and the separator axis 34 intersect at or below the pre-motorfilter 362. The filter chamber 374 further includes a screen 378 and aplurality of ribs 382 positioned between the screen 378 and thepre-motor filter 362.

With continued reference to FIG. 7, a plenum 386 is in the fluid flowpath immediately upstream from the motor assembly 114. In theillustrated embodiment, the plenum 386 is positioned within the mainbody 22 and is immediately downstream of the pre-motor filter 362 andthe screen 378. In other words, the screen 378 is positioned between thepre-motor filter 362 and the plenum 386. The plenum 386 is funnel-shapedand may be referred to as a bell-mouth plenum. The plenum 386 directsthe airflow from the pre-motor filter 362 to an inlet 390 to the motorassembly 114. The inlet 390 to the motor assembly 114 is open and thescreen 378 is positioned upstream and spaced from the open motor inlet390. In some embodiments, the fluid flow path through the plenum 386includes a volumetric flow rate of at least 20 cubic feet per minute(CFM) measured at the suction inlet (i.e., the inlet aperture 226). Theplenum 386 includes a wall portion 394 facing the downstream surface 370of the pre-motor filter 362. A cavity 398 is formed between the plenum386 and the main body 22.

With continued reference to FIG. 7, the handheld vacuum cleaner 10further includes a sensor 402 operable to measure a characteristic ofthe fluid flow path (e.g., air pressure, volumetric air flow rate,etc.). In the illustrated embodiment, the sensor 402 is positioned onthe plenum 386. Specifically, the sensor 402 is positioned on the wallportion 394 of the plenum 386 facing the downstream surface 370 of thepre-motor filter 362. In other words, the sensor 402 is positionedwithin the cavity 398, with at least a portion of the sensor 402 influid communication with the airflow within the plenum 386 via anaperture 406 formed in the plenum 386. In alternative embodiments, thesensor 402 may be positioned in a different location along the air flowpath. Additionally, more than one sensor 402 may be utilized to measureone or more air flow characteristics. As described in greater detailbelow, the measurements from the sensor 402 are utilized to control thehandheld vacuum cleaner 10.

With reference to FIG. 9, a schematic of an information transmissionsystem 408 is illustrated. The information transmission system 408includes the vacuum controller 410 (e.g., microprocessor, etc.), thesensor 402, and a transmitter 414. As explained in greater detail below,the handheld vacuum cleaner 10 includes the transmitter 414, which iselectrically coupled to the controller 410, and the transmitter 414 isoperable to transmit a wireless communication signal (e.g., via radiosignal, Wi-fi®, Bluetooth®, or any other wireless internet or networkcommunication) providing information to a personal device 418 of a user.Specifically, the personal device 418 includes a device controller 426,a receiver 430 electrically coupled to the device controller 426, and adisplay 434 electrically coupled to the controller 426. In particular,the receiver 430 is configured to receive the information transmitted bythe transmitter 414, and the display 434 is configured to provide adisplay to the user in response to the information. For example, thevacuum controller 410 monitoring the sensor 402 may provide an alert tothe visual indicator 422 and to the personal device 418 through thetransmitter 414 if the sensor indicates that the filter needsmaintenance or if the system has a clog. In some embodiments, thepersonal device 418 is a cell phone. In other embodiments, the personaldevice 418 is a personal computer.

With reference to FIG. 8, the cyclonic separator assembly 26 isremovable from the main body 22. In particular, the inlet nozzle 42, thecyclonic chamber 30, and the dirt collection region 38 are removed as asingle unit when the cyclonic separator assembly 26 is removed from themain body 22. In other words, the dirty air inlet 14 and the cyclonicchamber 30 are part of the cyclonic separator assembly 26. A releaseactuator 438 is configured to release the cyclonic separator assembly 26from the main body 22 when actuated by a user. In the illustratedembodiment, the release actuator 438 is positioned on and accessiblefrom the bottom 94 of the main body 22. In addition, the actuator 438 ispositioned between the cyclonic separator assembly 26 and the battery138. Specifically, the actuator 438 is positioned between the expandedportion 346 of the dirt collection region 38 and the battery 138.

With reference to FIGS. 4 and 8, the release actuator 438 is movablebetween a locking position (FIG. 4) that prevents removal of thecyclonic separator assembly 26 from the main body 22, and a releasedposition (FIG. 8) that allows removal of the cyclonic separator assembly26 from the main body 22. Movement of the actuator 438 between thelocking position and the released position is along an actuation axis442. In the illustrated embodiment, the actuation axis 442 is parallelto the battery insertion axis 158. Specifically, the actuator 438includes a user-actuated portion 446 and a locking portion 450 thatengages the cyclonic separator assembly 26 when the actuator 438 is inthe locking position (FIG. 4). In particular, the locking portion 450engages a corresponding hook portion 454 formed on the cyclonicseparator assembly 26 when the actuator 438 is in the locking position.In addition, the locking portion 450 includes an inclined surface 458such that when the cyclonic separator assembly 26 is being coupled tothe main body 22, the hook portion 454 on the cyclonic separatorassembly 26 engages the inclined surface 458 to move the actuator 438 tothe released position. A spring 562 is positioned between the actuator438 and the main body 22 to bias the actuator 438 toward the lockingposition.

With continued reference to FIG. 8, a lip 466 is formed on the main body22 and the inlet nozzle 42 includes a corresponding notch 470. Inalternative embodiments, the lip is formed on the inlet nozzle 42 andthe corresponding notch is formed on the main body 22. In theillustrated embodiment, the lip 466 is received within the notch 470when the cyclonic separator assembly 26 is coupled to the main body 22.In particular, the cyclonic chamber 30 is positioned between the lip 466and the actuator 438 when the cyclonic separator assembly 26 is coupledto the main body 22. The lip 466 and the notch 470 define a pivot axis474 about which the cyclonic separator assembly 26 is configured topivot with respect to the main body 22. To secure the cyclonic separatorassembly 26 to the main body 22, the lip 466 is inserted into the notch470 to provide support of the cyclonic separator assembly 26 at the top90 of the main body 22. Then, the cyclonic separator assembly 26 ispivoted about the axis 474 toward the main body 22 until the actuator438 securely engages with the hook portion 454 formed on the cyclonicseparator assembly 26. Likewise, to remove the cyclonic separatorassembly 26, a user depresses the user-actuated portion 446 of theactuator 438 to release the hook portion 454. Once released, thecyclonic separator assembly 26 pivots about the axis 474 away from themain body 22 and then the notch 470 is separated from the lip 466 on themain body 22. When the cyclonic separator assembly 26 is removed fromthe main body 22, the downstream surface 370 of the pre-motor filter 362is exposed on the cyclonic separator assembly 26 and the screen 378 isexposed on the main body 22.

With continued reference to FIGS. a seal 478 is made between the mainbody 22 and the cyclonic separator assembly 26 when the cyclonicseparator assembly 26 is coupled to the main body 22. In the illustratedembodiment, the seal 478 is the only seal made between the cyclonicseparator assembly 26 and the main body 22, thereby minimizing thepotential for leaks. Compression of the pre-motor filter 362 forms theseal 478 between the main body 22 and the cyclonic separator assembly26. In particular, the pre-motor filter 362 includes a circumferentialface or flange 482 around an outer periphery of the pre-motor filter 362that is compressed to form the seal 478. The main body 22 may include acorresponding protrusion 486 (e.g., an annular rib) that engages theflange portion 482 of the pre-motor filter 362 when the cyclonicseparator assembly 26 is coupled to the main body 22. In other words,the annular rib 486 compresses the face or flange 482 on the pre-motorfilter 362 to create an air-tight seal between the cyclonic separatorassembly 26 and the main body 22. The face or flange 482 may include anelastomeric surface integral with the filter 362 forming the contactingsurface to the main body.

With reference to FIGS. 5A-5B, the battery receptacle 150 includes alatch 490 moveable between a blocking position (FIG. 5A) that preventsremoval of the battery 138 from the receptacle 150, and a releasedposition (FIG. 5B) that allows removal of the battery 138 from thereceptacle 150. The latch 490 is a single integrally molded part. Inother words, the latch 490 elastically deforms to move between theblocking position (FIG. 5A) and the released position (FIG. 5B). In theillustrated embodiment, the latch 490 flexes between the blockingposition and the released position as a cantilever. The latch 490includes a user-actuated portion 494 and a locking portion 498 thatengages the battery 138 when the latch 490 is in the blocking position.Specifically, the locking portion 498 abuts a surface 502 of the battery138 when the latch 490 is in the blocking position.

In addition, the latch 490 includes a fixed connection 506 secured tothe main body 22. The locking portion 498 of the latch 490 is positionedbetween the fixed connection 506 and the user-actuated portion 494. Morespecifically, the locking portion 498 includes a connecting portion 510extending to the fixed connection 506. In the illustrated embodiment,the connecting portion 510 is wave-shaped. The connecting portion 510deforms when the latch 490 moves between the blocking and releasedportions. Optionally, the latch 490 also includes a spring 514 formedintegrally with the latch 490 (e.g., an integrally molded spring) thatpushes the latch 490 toward the blocking position. The spring 514contacts the main body 22 pressing the latch 490 toward the blockingposition. Additional springs, such as a spring 518 (separate from thelatch 490) may be positioned between the latch 490 and the main body 22to further position the latch 490 toward the blocking position. As such,the connecting portion 510, the spring 514, and the spring 518 each urgethe latch 490 toward the blocking position.

With continued reference to FIG. 5A, the battery receptacle 150 furtherincludes an eject assist assembly 522 that presses the battery 138 awayfrom the electrical contacts 202 and out of a position engagable by thelocking portion 498. In other words, the eject assist assembly 150 aidsin the removal of the battery 138 from the receptacle 150 when thebattery 138 is released from the main body 22. In particular, the ejectassist assembly 522 includes an ejector 526 (e.g., an elastomeric cover)and a spring 530 that pushes the ejector 526 toward the receptacle 150.The ejector 526 is configured to extend into the receptacle 150 when thebattery 138 is removed from (i.e., not positioned completely within) thereceptacle 150. As such, when the user actuates the latch 490 to releasethe battery 138, the ejector 526 pushes the battery 138 out of aposition engagable by the locking portion 498 so that the user canremove the unlatched battery.

With continued reference to FIG. 5B, the battery receptacle 150 and thebattery 138 are coupled together upon insertion of the battery 138 inthe receptacle 150 by a tongue and groove connection 534. One of thefourth surface 198 and the second surface 190 is coupled to the mainbody 22 with the tongue and groove connection 534 when the battery 138is positioned within the receptacle 150. In the illustrated embodiment,the second surface 190 of the battery 138 includes a tongue 538 of thetongue and groove connection 534, and the first wall 166 of thereceptacle 150 includes a corresponding groove 542 of the tongue andgroove connection 534. In alternative embodiments, the tongue ispositioned on the receptacle 150 and the groove is positioned on thebattery 138.

In addition, the battery 138 includes a ramp 546 that moves the latch490 from the blocking position to the released position when the battery138 is inserted into the receptacle 150. In other words, when thebattery 138 is inserted into the receptacle 150, engagement of thelocking portion 498 with the ramp 546 causes the latch 490 to deflect tothe released position (FIG. 5B) until the battery 138 is fully inserted.Once the battery 138 is fully inserted into the receptacle 150, thelatch 490 is biased back into the locking state (FIG. 5A) by at leastthe spring 514, the spring 518, or the connecting portion 510.

Actuation of the user-actuated portion 494 deflects the locking portion498 to the released position (FIG. 5B). In particular, the user-actuatedportion 494 of the latch 490 is constrained by the main body 22 totranslate along a single axis 550 only. When the user-actuated portion494 is translated along the axis 550, in one example sliding in adirection away from the battery, the remaining portions of the latch 490elastically deform or deflect such that the locking portion 498 is movedto the released position. In the released position (FIG. 5B), thelocking portion 498 is spaced from the surface 502 on the battery 138disengaged from the battery. In some embodiments, the single axis 550 istransverse to the direction of the battery insertion axis 158. In otherembodiments, the single axis 550 is generally along the batteryinsertion axis 158, in which case the user-actuated portion of the latchis pulled toward the user. Once released, the eject assist assembly 522at least partially ejects the battery 138 from the receptacle 150 andthe user is able to remove the battery 138 completely from thereceptacle 150. Various latch shapes may be configured to provideelastic deformation causing the locking portion to move to the releasedposition when the user-actuated portion is moved in a direction desiredfor the application.

With reference to FIGS. 11-13, the handheld vacuum cleaner 10 isoperable with a cleaning attachment. Specifically, the inlet nozzle 42is selectively coupled to the cleaning attachment. In the illustratedembodiment, the cleaning attachment is a surface cleaning attachment 554with a rigid wand 558 having an end 562 mounted to the dirty air inlet14 and an opposed end 566 mounted on a surface cleaning head 570. Thewand 558 is linear and defines a wand axis 574. The wand axis 574 iscollinear with the inlet axis 46. As described above, the bottom door350 of the cyclonic separator assembly 26 is openable, even when thewand 558 is mounted to the dirty air inlet 14. In alternativeembodiments, the handheld vacuum cleaner 10 is coupled to alternativecleaning attachments (e.g., extension wands, mini surface cleaningheads, crevice tools, etc.).

With reference to FIG. 12, the handheld vacuum cleaner 10 may be storedwith the surface cleaning attachment 554 in an upright, stored position.With reference to FIG. 13, the separator axis 34 is vertical when thehandheld vacuum cleaner 10 is attached to the surface cleaningattachment 554 and oriented in an inclined, in-use position. Since theseparator axis 34 is vertical when the handheld vacuum cleaner 10 is inthe in-use position (FIGS. 4 and 13), the effectiveness of the cyclonicchamber 30 during use (i.e., operation) is improved. In other words,operation of the cyclonic chamber 30 is improved when the separator axis34 remains vertical during use (i.e., when the handheld vacuum cleaner10 is being used as a handheld (FIG. 4), or with a surface cleaningattachment 554 (FIG. 13)).

With continued reference to FIGS. 1 and 12, the inlet nozzle 42 includesthe electrical connection 286 proximate the dirty air inlet 14. Theelectrical connection 286 provides electrical power to the cleaningattachment. In the illustrated embodiment, the electrical connection 286provides electrical power to rotate a brushroll 578 positioned withinthe surface cleaning head 570. In alternative embodiments, theelectrical connection 286 may provide electrical power to a light,sensor, or other electrical components in the cleaning attachment.

In the embodiment illustrated in FIG. 3, the trigger 100 actuates amicro-switch in electrical communication with the vacuum controller 410.Upon user activation of the trigger 100, the micro-switch provides anelectrical output to the controller 410 signaling for the controller toactivate the vacuum. The vacuum controller may be configured to providepower while the user holds the trigger against the micro-switch. In oneembodiment, the controller 410 is programmed to identify two actuationsof the trigger within a short period, for example, two actuations of thetrigger within 1 second, or 1.5 second, or 2 second, indicating a doubletap of the trigger. When the vacuum controller receives a double tap ofthe trigger, the vacuum controller provides power without the userholding the trigger, remaining on until the user actuates the triggeragain.

As such, the controller 410 includes instructions for a method ofcontrolling the handheld vacuum cleaner 10 that includes monitoring auser activated switch (i.e., the trigger 100 and/or the micro-switch),and activating the motor 118 providing airflow along the fluid flow pathwhile the user activated switch is activated. The method furtherincludes determining when the user activated switch is activated by auser twice within a predetermined period of time (i.e., 1 second, 1.5seconds, 2 seconds, etc.), and continuously activating the motor withoutfurther activation of the user activated switch upon determining theuser activated switch has been activated twice within the predeterminedperiod of time. The method further includes deactivating the motor 118upon the next activation of the user activated switch. In other words,when the user activated switch is activated twice in the predeterminedperiod of time, the motor 118 will operate continuously until the useractivates the user activated switch a third time.

In operation, upon user activation of the trigger 100, the battery 138provides power to the motor 118 to rotate the fan 130, generating asuction airflow drawn through the inlet nozzle 42 along with debris. Theairflow, entrained with debris, travels into the cyclonic chamber 30where the airflow and debris rotate about the separator axis 34.Rotation of the airflow and debris in the primary cyclonic stage 314causes the debris to separate from the airflow and the debris isdischarged through the dirt outlet 306. The separated debris then fallsfrom the dirt outlet 306 into the dirt collection region 38. The cleanair travels through the perforated shroud 322 into the secondarycyclonic stage 318 where debris is separated from the airflow and thedebris is discharged through the dirt outlet 334 into the dirtcollection region 38. The clean airflow then travels through thecyclonic clean air outlet 310 to the filter chamber 374, where theairflow then travels through the pre-motor filter 362. Downstream of thepre-motor filter 362 the airflow is routed by the plenum 386 to theinput 390 to the motor assembly 114. After traveling through the motorassembly 114, the airflow is exhausted from the handheld vacuum cleaner10 through the clean air outlet 18 formed in the main body 22.

After using the handheld vacuum cleaner 10, the user can open the door350 to empty the dirt collection region 98. After several uses, debrismay have collected on, for example, the shroud 322 or generally withinthe cyclonic chamber 30. If so, the user can remove the cyclonicseparator assembly 26 from the main body 22 by depressing the actuator438. Removing the cyclonic separator assembly 26 from the main body 22provides improved access to the cyclonic chamber through either thefilter chamber 374 or the bottom door 350.

As described above, the sensor 402 measures a characteristic of theairflow and is used in a method 582 of controlling the handheld vacuumcleaner 10 (FIG. 10). The method 582 includes measuring a pressure valueof the airflow through the fluid flow path (step 586). Specifically,measuring the pressure value of the airflow is measured downstream ofthe pre-motor filter 362, within the plenum 386. The method 582 alsoincludes determining whether the pressure value exceeds a predeterminedthreshold, which is indicative of a clog within the fluid flow path(step 590). When the pressure value exceeds the predetermined threshold,the method 582 includes alerting a user of the vacuum cleaner (step594). Alerting the user at step 594 includes transmitting an alert tothe personal device 418 (e.g., cell phone, personal computer, etc.) ofthe user and, optionally, providing to the personal device informationidentifying to the user a plurality of possible clog locations along thefluid flow path on the display 434. In some embodiments, transmitting analert to the personal device 418 is transmitted with directvacuum-to-device wireless data communication (e.g., Wi-Fi®, Bluetooth®,or other radio signal). In other embodiments, transmitting an alert tothe personal device 418 is transmitted via wired or wireless internet ornetwork communication. The alert also includes instructions for the userto clean the possible clog locations along the fluid flow path to removethe clog, which are illustrated on the device display 434. Alerting theuser further includes activating the visual indicator 422 positioned onthe handheld vacuum cleaner 10. In some embodiments, the method 582 mayfurther include the step of disabling the airflow through the fluid flowpath when the pressure value exceeds the predetermined threshold. Insome embodiments, the controller 426 is executing instructions in theform of an application program (a.k.a. an app), which enables the userto interface with the handheld vacuum cleaner 10 through the display434.

Various features and advantages of the invention are set forth in thefollowing claims.

What is claimed is:
 1. A handheld vacuum cleaner comprising: a fluidflow path extending from a dirty air inlet to a clean air outlet; a mainbody including a handle; a motor assembly positioned in the main bodyand along the fluid flow path, the motor defining a motor rotationalaxis; a cyclonic chamber positioned in the fluid flow path, the cyclonicchamber including a cyclone dirty fluid inlet and a cyclone clean fluidoutlet, the cyclonic chamber defining a separator axis, wherein theseparator axis and the motor rotational axis form an obtuse angleextending between the cyclonic chamber and the motor assembly; apre-motor filter in the fluid flow path downstream from the cyclonicchamber and upstream from the motor assembly; a plenum in the fluid flowpath immediately upstream from the motor assembly; and a sensorpositioned on the plenum, the sensor operable to measure acharacteristic of the fluid flow path.
 2. The handheld vacuum cleaner ofclaim 1, wherein the plenum includes a wall portion facing a downstreamsurface of the pre-motor filter, and wherein the sensor is positioned onthe wall portion.
 3. The handheld vacuum cleaner of claim 1, wherein acavity is formed between the plenum and the main body, and wherein thesensor is positioned in the cavity.
 4. The handheld vacuum cleaner ofclaim 1, wherein the fluid flow path includes a volumetric flow rate ofat least 20 cubic feet per minute measured at the dirty air inlet. 5.The handheld vacuum cleaner of claim 1, wherein the motor rotationalaxis and the separator axis intersect at or below the pre-motor filter.6. The handheld vacuum cleaner of claim 1, wherein the obtuse angleextending between the cyclonic chamber and the motor assembly is withina range of 90 degrees to 165 degrees.
 7. The handheld vacuum cleaner ofclaim 1, wherein the obtuse angle extending between the cyclonic chamberand the motor assembly is within a range of 135 degrees to 150 degrees.8. The handheld vacuum cleaner of claim 1, wherein the obtuse angleextending between the cyclonic chamber and the motor assembly is 150degrees.
 9. The handheld vacuum cleaner of claim 1, further comprising ascreen positioned between the pre-motor filter and the plenum.
 10. Thehandheld vacuum cleaner of claim 9, further comprising at least one ribpositioned between the screen and the pre-motor filter.
 11. The handheldvacuum cleaner of claim 9, wherein the motor assembly includes an openmotor inlet and the screen is positioned upstream and spaced from themotor inlet.
 12. The handheld vacuum cleaner of claim 1, wherein acontroller monitors the sensor and provides an alert that depends oninformation provided by the sensor.
 13. The handheld vacuum cleaner ofclaim 12, wherein the controller provides the alert to a display. 14.The handheld vacuum cleaner of claim 13, wherein the display is ascreen.
 15. The handheld vacuum cleaner of claim 12, wherein thecontroller provides the alert to a personal device through atransmitter.
 16. The handheld vacuum cleaner of claim 15, wherein thepersonal device is a cell phone.
 17. The handheld vacuum cleaner ofclaim 15, wherein the personal device is a personal computer.
 18. Thehandheld vacuum cleaner of claim 1, wherein sensor measures a pressurewithin the plenum.
 19. The handheld vacuum cleaner of claim 1, whereinthe sensor measures a pressure downstream of the pre-motor filter. 20.The handheld vacuum cleaner of claim 19, wherein the handheld vacuumcleaner includes an information transmission system configured totransmit information to a user about a potential clog in the fluid flowpath depending upon the pressure measured by the sensor.